A	B
Spinach	Roughage
Milk	Iodine
Salt	Iron
Whole grain	Calcium

(ii)Milk-(d)calcium -Milk and other dairy products are sources of calcium. Calcium is a mineral that the body needs for numerous functions, including building and maintaining bones and teeth, blood clotting, the transmission of nerve impulses, and the regulation of the heart’s rhythm.

(iii)Salt-(b)iodine-Table salt contains a minute amount of the element iodine. Iodine intake in form of iodised salt prevents iodine deficiency. This deficiency may cause thyroid gland problems,

(Iv)Whole grain-(a)roughage-Fibre, also known as roughage, is the part of plant-based foods (grains, fruits, vegetables, nuts, and beans) that the body can't break down.

So, the correct option is 'i-c, ii-d, iii-b, iv-a'.